Ponto Jing-Rio (Metal)Ponto Jing-Rio (Metal)Ponto local do péSafeMembro Inferior
Depth
00.3–0.5 cun3.0
Oblique insertion
Precautions
No special precautions. It is important to extend (dorsiflex) the ankle by pulling the toes toward the tibia before locating this point.
📍 Location (classical)
At the ankle, 1 cun anterior to the prominence of the medial malleolus, in the significant depression just medial to the tendon of the tibialis anterior when the ankle is in extension/dorsiflexion.
🧭 How to find it (practical)
With the foot in dorsiflexion (pulling the toes toward the tibia to bring out the tibialis anterior tendon), locate the point anterior and inferior to the medial malleolus, in the significant depression medial to the tibialis anterior tendon, approximately 1 cun anterior to the malleolar prominence (WHO 2008, §LR-4).
🔬 Anatomy
Medial to the tendon of the tibialis anterior. Innervated by the saphenous nerve and the deep fibular nerve.
💉 Needling
Perpendicular insertion 0.3–0.5 cun, or oblique insertion medially or laterally.
📜 Etymology
Zhong (中), middle; Feng (封), mound, seal. The point lies at the ankle, between the tendons of the tibialis anterior and extensor hallucis longus, as in a depression between two mounds — hence the name "middle seal" (Deadman, A Manual of Acupuncture, 2007, p. 473).
